Ronald Bultje video4linux-list@xxxxxxxxxx wrote: > This has to do with buffersize images and limitations in the linux > kernel to give us bigger contiguous buffers and of the buz card to > cope with non-contiguous buffers, as far as I know. It's one of > these things I actually don't understand fully, but that might come > later on ;-). > Don't pin me down on this one ;-). Do you have any URLs to more info? Or possibly source code files that are relevant to this issue? Any /proc hacks that address it??? > Mjpegtools' lavrec uses JPEG buffers. The card seems to be able > to cope with non-contiguous JPEG buffers fairly well (except for > some buggy mainboards). This means that A) we need smaller buffers > since JPEG video doesn't take as much space as raw video and B) we > can use larger buffers than the maximum we can allocate at once > contiguously because we can use non-contiguous buffers. As a > consequence, JPEG-capture works perfectly and overlay/v4l-capture > is pretty limited. Makes sense. I'm actually not getting audio on capture, although could that might be a sound daemon setup problem (I don't have esd properly setup to allow more than one tap on /dev/dsp)? > It shouldn't make a difference ;-). > Actually, the Tyan Tiger is a kt266A-based mainboard, isn't it? There are various mainboards in the Tiger series. The Tiger MP is the AMD760MP (762 north, 766 south) chipset, dual Athlon. The 766 southbridge (as well as the 768 used in the AMD760MPX) _may_ be based on the ViA 686/8233 southbridge design, but I'm not sure. I would say not because a number of issues I've had with ViA 686/8233 southbridges don't seem to have issues on the AMD760MP. And I've got _all_ 6 of my PCI slots full: GF3Ti200 AGP, ES1373 audio PCI, Tulip NIC PCI, IOMega Buz PCI (with PCI-PCI bridge), 3Ware Escalade 6000 ATA RAID (with PCI-PCI bridge) and dual-Voodoo2 12MB PCIs. > I'm surprised you have this working, you might want to report this > on mjpeg-users@xxxxxxxxxxxx, since some people have problems getting > it to work on kt266A-based boards. A number of post-2.4.5 kernels seem to be working with ViA chipsets -- at least some of the newer ones. It appears that a number of the 686/8233 southbridge issues have been addressed. -- Bryan -- They "sell" software "like a book" so they can sell it en masse without a written agreement. But if you want to "transfer" it, they say it's not "like a book" but "licensed" under agreement. --------------------------------------------------------------- Bryan J. Smith, SmithConcepts, Inc. mailto:b.j.smith@xxxxxxxx Engineers and IT Professionals http://www.SmithConcepts.com
